Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1995B4000 4WD V6-4.0L OHVREPAIR AND DIAGNOSISSPECIFICATIONSPRESSURE, VACUUM AND TEMPERATURE SPECIFICATIONSENGINE LUBRICATIONOIL PUMP, ENGINEOIL PRESSURE REGULATOR VALVE
1995 Mazda B4000 4WD V6-4.0L OHV
Oil Pressure Regulator Valve
1995 Mazda B4000 4WD V6-4.0L OHVSECTION Oil Pressure Regulator Valve
Oil Pump Relief Pressure
1982-84 (2.2L) B2200 DSL See Oil Pressure or Oil Filter Pressure.
1982-86 (2.0L) B2000 See Oil Pressure or Oil Filter Pressure.
1987-93 (2.2L) B2200 kPa {kgf/cm2, psi} 300-390 {3.0-4.0, 43-56}.
1987-93 (2.6L) B2600 kPa {kgf/cm2, psi} 400-490 (4.0-5.0, 57-71).
1994-96 (2.3L) No specification given.
1994-96 (3.0L) B3000 28.2mm (1.11 in), 40.5-44.9 N, (21-22 kgf, 9.1-10.1 lbf).
1994-96 (4.0L) B4000 35.3mm (1.39 in)/30.0-32.3 kgf,{13.6-14.7 lbf}.
1993-96 (3.0L) MPV 383-481 kPa (3.9-4.9 kgf/cm2), 56-69 psi.
1982-84 (2.2L) B2200 DSL See Oil Pressure or Oil Filter Pressure.
1982-86 (2.0L) B2000 See Oil Pressure or Oil Filter Pressure.
1987-93 (2.2L) B2200 kPa {kgf/cm2, psi} 300-390 {3.0-4.0, 43-56}.
1987-93 (2.6L) B2600 kPa {kgf/cm2, psi} 400-490 (4.0-5.0, 57-71).
1994-96 (2.3L) No specification given.
1994-96 (3.0L) B3000 28.2mm (1.11 in), 40.5-44.9 N, (21-22 kgf, 9.1-10.1 lbf).
1994-96 (4.0L) B4000 35.3mm (1.39 in)/30.0-32.3 kgf,{13.6-14.7 lbf}.
1993-96 (3.0L) MPV 383-481 kPa (3.9-4.9 kgf/cm2), 56-69 psi.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.